revert black 'not recommended' icon to red
discussion: https://lists.torproject.org/pipermail/metrics-team/2017-April/000316.html
This is currently relevant again due to a high number of outdated relays (TROVE-2017-002)
discussion: https://lists.torproject.org/pipermail/metrics-team/2017-April/000316.html
This is currently relevant again due to a high number of outdated relays (TROVE-2017-002)